Table 2. Outcomes for individual studies.
| Study, year | Mean procedure duration, mins (SD) | Mean LOS, days (SD) | Mean Postoperative GCSI score, (SD) | Mean reduction in GCSI pre/post, (SD) | Clinical success | Normal GES | Complication rates | Reintervention rates | Readmisson rates |
| Landreneau, 2019 | G-POEM: 33.9 (18.8) Surgery: 99.9 (41.8) |
G-POEM: 1.4 (1.0) Surgery: 4.6 (5.6) |
G-POEM: 2.4 (1.5) Surgery: 2.3 (1.5) |
G-POEM: 1.6 (0.3) Surgery: 1.7 (0.3) |
G-POEM: 6 Surgery: 5 |
G-POEM: 8 Surgery: 7 |
G-POEM: 1 Surgery: 5 |
G-POEM: 1 Surgery: 1 |
G-POEM: 2 Surgery: 5 |
| Pioppo, 2021 | G-POEM: 58.0 (27.6) Surgery: 78.4 (13.1) |
G-POEM: 1.3 (1.0) Surgery: 4.2 (0.7) |
G-POEM: 1 (0.8) Surgery: 1.7 (0.6) |
G-POEM: 2.8 (0.8) Surgery: 1.5 (0.7) |
G-POEM: 36 Surgery: 52 |
G-POEM: NR Surgery: NR |
G-POEM: 5 Surgery: 21 |
G-POEM: NR Surgery: NR |
G-POEM: NR Surgery: NR |
| AbiMansour, 2020 | G-POEM: 60.6 (29.6) Surgery: 151.8 (72.0) |
G-POEM: 1.5 (2.4) Surgery: 10.9 (20.8) |
G-POEM: 1.1 (1.3) Surgery: 2.3 (1.1) |
G-POEM: 1.8 (1.6) Surgery: 1 (0.9) |
G-POEM: 24 Surgery: 9 |
G-POEM: 12 Surgery: 6 |
G-POEM: 9 Surgery: 11 |
G-POEM: 8 Surgery: 2 |
G-POEM: NR Surgery: NR |
| Clapp, 2022 | G-POEM: 25.3 (6.1) Surgery: 91.5 (10.4) |
G-POEM: NR Surgery: NR |
G-POEM: 2.5 (1.2) Surgery: 2.0 (1.1) |
G-POEM: 0.9 (1.2) Surgery: 1.9 (1.2) |
G-POEM: NR Surgery: NR |
G-POEM: NR Surgery: NR |
G-POEM: 12 Surgery: 6 |
G-POEM: NR Surgery: NR |
G-POEM: 12 Surgery: 3 |
GCSI, Gastroparesis Cardinal Symptom Index; GES, gastric emptying study; G-POEM, gastric per-oral endoscopic myotomy; LOS, length of stay; lNR, not reported; SD, standard deviation.